Shovel attachment



3, 1 M. w. PARKE R I 2,300,801 v I 0 SHOVEL ATTACHMENT Filed Nov. 18, 1941 v 3 Sheets-Sheet 1' Q a a m M w/v W Elk/(5R,

v Attorney Inventor Nov. 3, 194 2. M. w. PARKER 2,300,s01

SHOVEL ATTACHMENT Filed Nov. 18, 1941 s Sheets-Sheet 2 Im entor 'MARw/v W PARKER,

; Attorney.

Nov. 3, 1942. M. w. PARKER 2,300,801

' SHOVEL, ATTACHMENT Filed Nov. 18, 1941 3 Sheets-Sheet 3 Inventor Attorne MAR v//\/ 14 PARKER,

Patented Nov. 3, 1942 UNITED STATE STYPATENT OFFICE SHOVEL ATTACHMENT Marvin W. Parker, Mineral, Ten, assignor of forty per cent toDewey Sinclair, Nor-manna, Tex.

Application November 18, 1941, Serial No. 419,647

' 1 Claim. (c1. 37-124) trucks, and which can otherwise be used in the place and stead of power shovels. A further object of the present invention is to provide a shovel attachment of this character which can be mounted on and used in conjunction with the grader without necessitating the regrader.

The invention. together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein- Figure 1 is a side elevational view of a grader having my shovel attachment mounted thereon. Figure2 is a diagrammatic view' of an hydraulic operating mechanism for the shovel.

Figure 3 is a top plan view of theshovel attachment.

Figure 4 is a vertical sectional view taken substantially on the line 4-4 of Figure 3.

Referring more in detail to the drawings it will be seen that ii indicates generally-a conventional grading machine of a type well known, andonly such parts of the machine will be specifically referred to herein as will be necessary-for a com-- plete understanding of the present invention.

In accordance with the invention, the frame 6 of the grader 5, at the forwardend thereof, is

provided with brackets |I through the medium of which and pivot elements 8-8 there are pivoted to the frame 8 the angular side members 9 of a frame l forming part of the attachment, and which frame is substantially U-shaped in top plan.

The side members 3-9 of the frame l0, as shown in Figure 4, are substantially of skeleton, triangular shaped frame construction, and at the closed end of the frame, the side members 9-9 are connected byan upper cross-bar ll.

At the closed end of the frame the'lower portions of the side member 9-9 are extended beyond the closed end of the frame to provide bearingv lugs i2, with which cooperate lugs l3 on a shovel l4 to accommodate pivot elements I move! of the blade and scarifier equipment of the 1 pivotally mounted on the forward or closed end of the frame ill.

Latches l6-i6 are pivoted on the bar II, and

engage the rear wall of the shovel l4, as suggested in Figure 4, for holding the shovel normally in a fixed position relative to the frame it).

The latches it are provided on a pivot rod i8 that has its ends i'ournaled in the upstanding bearings H, and intermediate its ends the rod I8 is provided with a crank arm l9- to which is connected one end of a push and pull rod 20.

The pull rod 20 extends rearwardly to terminate within the cab 2| of the grader 5,-and in convenient reach of the operator of the grader for manipulation to release. the shovel l4 for dumping purposes when desired.

To control the raising and lowering of the shovel-carrying frame there is provided a ram indicated generally by the reference numeral 22.

The hydraulic ram 22 is in the form of a cylin-,

der 23 in which a piston 24 has a working fit.

Piston 24 is provided on one end of a rod 25 that at its free end isprovided with a tubular cross-head 26 sleeved on one end of a cross-rod 2i-mounted between the opposing sides 9 of the frame iii as shown.

At one end thereof the cylinder 23 is provided with an apertured lug 23 that aligns with apertured lugs 29 mounted on the forward end of the 30 frame 3 to accommodate a pivot bolt 30 through the medium of which the cylinder 23 ofthe ram is pivoted to the frame 6.

The, reference numeral 3| indicates an hy-' draulic pump which is mountedat the rear of the motor grader 5 and driven through the medium of a belt and pulley drive connection, or any other power transmission means from the crank shaft of the motor of the grader 5.

The-reference numeral 32 indicates a storage tank suitably mounted on the grader 5 and in operation the pump maintains a continuous flow of oil from the storage tank through the intake line 33, a constant pressure being maintained by means vof an automatic pressure valve (not shown) which permits oil to flow through the bypass line 34 when the gate valve 35 in the line .36 is closed. I

The reference numeral 31 indicates a return line from the ram cylinder 23 to the storage tank 32, and interposed in the line 31 is a gate valve through the medium of which the shovel I4 is The valves 35 and 39 are located in the cab 2i as suggested in Figure 1 so as to be convenient to the operator.

From the above it will be apparent that when it is desired to lift the shovel, or, in other words, to raise it from the dotted line position shown in Figure 4, to the full line position shown in said figure, the operator closes the return valve 38 and opens the pressure valve 35. There being a con-.

stant pressure in the line 38, oil immediately flows into the ram cylinder 23 and exerts a pres-- sure on the piston 24 urging the same in a direction lengthwise of the cylinder to force the frame I and bucket l4 associated therewith to swing upwardly as a unit'to the full line position shown in Figure 4, whereupon the operator then closes the valve 35.

When the bucket has thus been raised, the con-,

tents of the bucket are readily dumped by the operator pulling on the rod 23. This will result in a raising of the latches ii to clear the bucket H, whereupon the bucket H, in response to the weight of the contents thereof, will swing on its pivot l5 to the dotted line position suggested in Figure 1 for emptying the contents of the bucket.

A length of chain 39 serves to limit swinging movement of shovel H downwardly relative to frame l0.

To lower the bucket, the operator closes pressure valve 35 and opens return valve 38. The weight of the bucket and the pressure on the ram piston 24 then forces the oil to flow through the return line 31 to the tank 32 permitting the frame III to drop downwardly.

As frame it drops downwardly, bucket I4 swings to its normal position, whereupon the rear wall thereof is engaged by the latches l6 and the parts are then in the position suggested by broken lines in Figure 4 for a repetition of the operation above described.

It is thought that the operation and advantages of a bucket attachment of this character will be clear to those skilled in the art without further detailed description.

It will also be understood that while I have herein illustrated whatvis considered the preferred embodiment of the invention, I am fully aware that in practical application of the invention minor changes may be resorted to without departing from the spirit of the invention as 10 herein claimed.

Having thus described the invention what is claimed as new is:

In a shovel attachment for graders of a type in which the grader is provided with a trans- -l5 verse frame member atits front end, a shovel carrying frame comprising.- a pair of spaced par- 7 aallel triangular-shaped side frame members including an upper leg, a lower leg and a front leg, and a transverse bar connecting the side frame members at the Junction of the upper and front legs thereof, a shovel pivotally attached to the side frame members at the Junction of the lower and front legs; theupper and lower legs converging at their rear ends, means pivotally connecting the rear ends of said side frameme'mof the graderat a point below the side frame members to said transverse rod for raising the shovel carrying frame, and remote actuated means carried by the transverse bar for releasably securing the shovel in load-retaining posi-' tion.

MARVIN, w. PARKER. 

